Group 6.C - Aluminum Storefronts and Entrances, Part III: Fundamental Design Factors and Specification Development Flashcards
The frame of a storefront installation must be designed to: support it's own weight support the structure of the building support the weight of glazing withstand live loads all of the above
support it’s own weight
support the weight of glazing
withstand live loads
The primary live load(s) imposed on storefront installations is:
Occupants / floor loads Wind loads Seismic loads Mechanical system pressure all of the above
Wind loads
Structural design and calculation in storefront assemblies is critical to:
maintain the narrow sightlines and use of narrow profiles
support the building
maximize glass for better merchandising
maintain energy efficiency
maintain the narrow sightlines and use of narrow profiles
maximize glass for better merchandising
The distance by which the frame overlaps the glass edge to hold the glass in place is called:
pocket
pressure bar
bite
glazing bead.
bite
The minimum distance by which the frame overlaps the glass edge (called _____) is at least ___ inch for single glazing or ___ inch for insulating glass units.
bite
5/16”
1/2”
Failure to provide adequate clearance and proper bite can result in: lower u factor costly glass failure higher wind loads hazardous glass blowout.
costly glass failure
hazardous glass blowout.
_____ are used to provide Appropriate clearance
between the edge of the glass and the metal frame.
Rubber seals
Glazing bead
Setting blocks
Type II sealant
Setting blocks
Setting blocks used to support glazing panels should have a Short ‘A’ durometer of:
65 +/- 5
95 +/- 5
85 +/- 5
75 +/- 10
85 +/- 5
In general, two setting blocks should be placed
under the lower edge of each panel of fixed glass.
They should be chosen to limit the load from the
glass to ___ psi, but in no case should they be less
than ____ inches in length.
60 / 4
80 / 2
100 / 2
40 / 4
60 psi,
no less than 4 inches in length.
Setting blocks should be positioned no closer to the vertical edges of the glass than ___inches or _____ of the glass width, whichever is greater.
6 / 1/4
4 / 1/8
4 / 1/4
6 / 1/8
6 / 1/8
A minimum of ___ (qty) ___ inch (minimum) edge blocks should also be located at both jambs of the glass to prevent the glass from “walking” in the opening after installation.
1 / 5
3 / 3
2 / 4
2 / 2
2 / 4
Edge blocks should be located at both jams, at the _____ of the glass panels.
top and bottom edges
quarter points
approximate center
top edges
top and bottom edges
The standard reference for determining the strength
of various aluminum profiles is data from:
AAMA SFM-1-14
NAFS
The Aluminum Association
AAMA 300
The Aluminum Association
The analytical procedures used in the engineering
design of aluminum framing members apply to:
the design of glass or opaque infill panels
simply-supported beams under uniform lateral (wind) loading
the design of glass or opaque infill panels
determination of and prevention of air infiltration and water penetration
determination of impact resistance
all of the above
The analytical procedures used in the engineering
design of aluminum framing members apply to
unwelded, single-span, simply-supported beams
subjected to bending under uniform lateral loading,
from forces such as wind.
They do not apply to the design of glass or opaque
nfill panels. Neither are they applicable to such
other considerations as air infiltration, water
penetration or impact resistance.
The analytical procedures used in the engineering
design of aluminum framing members apply to:
*the design of glass or opaque infill panels
simply-supported beams under uniform lateral (wind) loading
*the design of glass or opaque infill panels
*determination of and prevention of air infiltration and water penetration pressure ratings.
*determination of impact resistance
*all of the above
The analytical procedures used in the engineering
design of aluminum framing members apply to
un-welded, single-span, simply-supported beams
subjected to bending under uniform lateral loading,
from forces such as wind.
They do not apply to the design of glass or opaque
infill panels. Neither are they applicable to such
other considerations as air infiltration, water
penetration or impact resistance.
The analytical procedures used in the engineering
design of aluminum framing members set forth calculation methods for the fundamental factors of:
• Load distribution and magnitude
• Section properties
• Strength
• Connections
• Deflection
You don’t need to know this.
Just sayin.
If allowances are not made for thermal expansion in a storefront system design or the framing is installed in a manner that restrains the framing from expanding, the sections will be subjected to ____.
lateral loading
thermal expansion
axial compression
wind loads
axial compression
The load used in the calculations is assumed to act
against the exterior face of the storefront and
perpendicular to it. For the sake of structural analysis of a given framing member, this load is considered to be distributed in a _______ or ______ pattern.
square or rectangular
arcing or circular
triangular or trapezoidal
argyle
triangular or trapezoidal
pattern.
If a member supports two or more areas
of glass and/or panels, the individual triangular or trapezoidal areas within the load distribution
diagram must be either_____ or _____ in order to obtain the total load on the member. (Choose two)
Added together before multiplying by the
applicable wind load
Multiplied by each other before adding to the applicable wind load.
Multiplied by the wind load and the
resulting products then added together
Added together before multiplying by the applicable wind load or Multiplied by the wind load and the resulting products then added together
The performance of a member having a given cross-section configuration or profile made of a given
aluminum alloy, and under a given set of loading
conditions, depends principally on two physical
properties: (Select two)
The Moment of Inertia, denoted by the letter I
The Cross-sectional Area of the member denoted by the letter a
The Mass per linear foot of the member profile, denoted by the letter M
Section Modulus, denoted by the letter S
The Moment of Inertia, denoted by the letter I
Section Modulus, denoted by the letter S
In engineering, the term “moment” indicates a
turning force or torque acting at a distance that
tends to either cause or resist rotation of an object
about a point or an axis. Mathematically, moments and torques are defined as a _____ multiplied by a
_____.
force / duration
force / distance
area / force
area/ duration
force / distance
As a simple example, for a uniform rod of length (L)
in meters and mass (m) in kilograms, with negligible
thickness, the moment of inertia about its center of
mass is given by this equation.
Intertia (center of mass)
Icm=(1/12m)L^2
1/12 of mass (kg) * Length sqared
The section modulus (S) is a geometric property for
a given cross-section _ a direct measure of the _____in a framing member when it is subjected to given loading conditions.
flex
compression
tension
stress
stress
Section properties for many sizes of symmetrical
geometric shapes such as solid rectangles, square
bars, round rods, square tubes, etc. are given in technical data from:
AAMA SFM-1-14
NAFS
The Aluminum Association
AAMA 300
The Aluminum Association
This is just a way of getting this rote stuff in front of you again.
